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首页> 外文期刊>Journal of Neurophysiology >Intermittent stimulus presentation stabilizes neuronal responses in macaque area MT
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Intermittent stimulus presentation stabilizes neuronal responses in macaque area MT

机译：间歇性刺激介绍稳定神经元响应在猕猴区域MT中

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摘要

Repeated stimulation impacts neuronal responses. Here we show how response characteristics of sensory neurons in macaque visual cortex are influenced by the duration of the interruptions during intermittent stimulus presentation. Besides effects on response magnitude consistent with neuronal adaptation, the response variability was also systematically influenced. Spike rate variability in motion-sensitive area MT decreased when interruption durations were systematically increased from 250 to 2,000 ms. Activity fluctuations between subsequent trials and Fano factors over full response sequences were both lower with longer interruptions, while spike timing patterns became more regular. These variability changes partially depended on the response magnitude, but another significant effect that was uncorrelated with adaptation-induced changes in response magnitude was also present. Reduced response variability was furthermore accompanied by changes in spike-field coherence, pointing to the possibility that reduced spiking variability results from interactions in the local cortical network. While neuronal response stabilization may be a general effect of repeated sensory stimulation, we discuss its potential link with the phenomenon of perceptual stabilization of ambiguous stimuli as a result of interrupted presentation.
机译：反复刺激会影响神经元反应。在这里，我们展示了在间歇刺激呈现期间发生中断的持续时间的猕猴视觉皮质中感觉神经元的响应特征。除了对神经元适应一致的响应量的影响之外，还影响了响应变异性。当中断持续时间从250％增加到2,000毫秒时，运动敏感区域MT中的尖峰速率变化降低。随后的试验和Fano因子之间的活动波动在全响应序列中均较低，中断较长，而尖峰定时模式变得更加规则。这些可变性部分地改变了响应幅度，而且还存在与适应响应幅度的适应变化不相关的另一种显着效果。此外，减少响应变异性伴随着尖峰场相干性的变化，指出了减少尖峰可变性的可能性来自当地皮质网络中的相互作用。虽然神经元反应稳定可能是反复感觉刺激的一般效果，但我们讨论其潜在的联系与由于中断的呈现而导致模糊刺激的感知稳定的现象。

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